Best Time to Visit Kythnos: Thermal Springs and Double Beaches

Kythnos is famous for the iconic Kolona beach · a sandbar connecting the island to an islet, creating a sea on both sides. It is also a major hub for yachting due to its proximity to Athens.

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Best Months

June & September

Air Temp

27°C

Sea Temp

24°C

Peak Crowds

High

The Sailing Schedule

Kythnos is typically the first or last stop for sailboats chartering out of Athens (Alimos/Lavrio). Consequently, the port of Merichas and the bay of Kolona are incredibly busy on Friday nights and Sunday mornings. Visiting mid-week in June or September ensures a much quieter experience.

Thermal Springs

The village of Loutra is home to natural thermal springs that flow into the sea. This makes Kythnos a viable destination even in the cooler months of April and October, where a hot soak in the sea is particularly enjoyable.

Why Visit Kythnos?

Iconic sandbar beach of Kolona

Natural thermal hot springs in the sea

Katafyki Cave, one of Greece's largest

Sophisticated yachting culture

Traditional villages of Chora and Driopida

Frequently asked questions about Kythnos

What is the best time to visit Kythnos?

The best time to visit Kythnos is June, September. These months offer ideal weather (around 25°C), warm sea temperatures and fewer crowds than peak season. May, June, September are excellent shoulder-season options.

How crowded is Kythnos in August?

In August, Kythnos experiences High crowd levels during the Greek holiday season and prime Meltemi winds. Prices are at their peak (€€€).

Is Kythnos windy during the summer?

Kythnos is heavily influenced by the Meltemi winds between June and September. This keeps the island cool but can affect high-speed ferry crossings.

Seasonal Flow

PeakActive

July-August

Peak Crowds: High€€€

ShoulderIdeal

May, June, September

Peak Crowds: Moderate€€

OffQuiet

October-April

Peak Crowds: Low€€

Ferry Tickets

Book route to Kythnos

Island Guide

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Best Time to Visit Kythnos | 2026 Guide